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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 1231-2006 |
Specifications of high strength bolts with large hexagon head,large hexagon nuts,plain washers for steel structures 钢结构用高强度大六角头螺栓、大六角螺母、垫圈技术条件 |
China National Standards nuts,plain |
 English PDF |
| GB/T 5286-2001 |
Plain washers for bolts，screws and nuts--General plan 螺栓、螺钉和螺母用平垫圈 总方案 |
China National Standards nuts,plain |
English PDF |
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